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[Mitochondria aberration of Aspergillus flavus under citral stress circumstance]
Man Luo1, Li-ke Jiang, Xiang-rong Dai
1Institute of Biomedical Engineering, Jinan University, Guangzhou 510632, China.
Abstract:
Observation of mitochondrion in Aspergillus flavus damaged by citral under uransmission electron microscope, it was found that mitochondria had changes on number increase and shape aberrance as hyperplasia or hypertrophy, which resulted from the DNA replication system in mitochondria was damaged by citral. From the data that free radical in A. flavus which were determined by MDA method, it was showed that citral damaged mitochondria via induced free radical, which affected oxidation-reduction system and energy metabolism.
Insights
Citral exposure damages Aspergillus flavus mitochondria, increasing their number and altering shape. This damage stems from citral disrupting mitochondrial DNA replication and inducing free radicals, impacting energy metabolism.
Area of Science:
- Mycology
- Cell Biology
- Biochemistry
Background:
- Mitochondria are vital organelles responsible for energy production.
- Aspergillus flavus is a common fungus with significant agricultural and health implications.
- Citral, a natural compound, has known antimicrobial properties.
Purpose of the Study:
- To investigate the effects of citral on Aspergillus flavus mitochondria.
- To elucidate the mechanisms by which citral induces mitochondrial damage.
Main Methods:
- Transmission electron microscopy was used to observe mitochondrial morphology.
- The malondialdehyde (MDA) assay was employed to quantify free radical levels.
Main Results:
- Citral exposure led to an increase in mitochondrial number and aberrant shapes (hyperplasia, hypertrophy) in Aspergillus flavus.
- Citral-induced damage was linked to the disruption of mitochondrial DNA replication.
- Increased free radical generation, indicated by MDA levels, was observed, suggesting oxidative stress.
Conclusions:
- Citral damages Aspergillus flavus mitochondria by impairing DNA replication and inducing oxidative stress.
- The observed mitochondrial dysfunction affects the fungus's oxidation-reduction system and energy metabolism.
- These findings highlight citral's potential as an agent to disrupt fungal cellular processes.
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